Fatigued Ariel

Hi! Pulling into M5 services on a wet n windy night, I noticed my 2004 1.6 Focus ariel antenna was resting flat on the roof! Tried to straighten it but it sheared off in my hand tho I hardly used any pressure.
Now left with sheared metal in both the antenna & the roof fixing so I can't tell which has the male threaded bit & which the female "socket"!
Any ideas? If I have to is it easy to remove the roof fixing & replace?
Thanks in advance.
Pete